There's a forum thread over at NeoGAF that has information about thatgamecompany's Project3, seemingly buried under all of the other E3 announcements made over the last two days or so. Similar to flOw and Flower, Journey is being developed for the PS3, although it wasn't mentioned if the game will have support for the PlayStation Move controller or not.

The world of Journey looks to be vast expanses of desert landscapes and ancient civilizations that players can visit and explore at their own leisure. The fact sheet also suggests that some sort of online component will come into play, possibly a co-op mode to fill the role of the strangers that you can travel with.

A couple of screenshots from thatgamecompany's Journey can be viewed here.